Variables are named containers that store information a program needs to use or change, such as a player's score in a game or a user's name. Programs use variables to keep track of data as it changes while the program runs.
Loops allow a program to repeat a set of instructions multiple times without rewriting the same code over and over. For example, a loop could repeat 'move forward one step' ten times instead of writing that instruction ten separate times, making code shorter and easier to manage.
Even experienced programmers make mistakes, and errors in code are called bugs. Debugging is the process of finding and fixing those errors, often by carefully testing small parts of a program, checking for typos, and tracing through the code step by step to see exactly where something goes wrong.